Sefu bin Hamid represented his father in the eastern Congo region of Kasongo and carried on the war in his stead.
[2][3] On 19 September 1892, after suffering an early defeat, Ngongo Lutete betrayed Sefu bin Hamid and defected to the Force Publique.
[3] In response to this, Sefu put the Resident of Kasongo, Lieutenant Joseph Lippens, and his adjunct, Sergeant Henri De Bruyne, under house arrest.
Sefu urged for a renegotiation of the borders of his territories and demanded Francis Dhanis to deliver him Ngongo Lutete through a prisoner exchange.
After the capture of on Kasongo 22 April 1893, the Force Publique discovered the graves of Lippens and De Bruyne, they also found the diaries of Emin Pasha, which indicated that he was killed on 23 October 1892.